Ace compre introducing bargain regularly (5)
I believe the answer is:
magic
'ace' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'compre introducing bargain regularly' is the wordplay.
'compre' becomes 'mc' (I am not sure about this - if you are sure you should believe this answer much more).
'introducing' means one lot of letters goes inside another (some letters introduced or inserted into others).
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternating letters of 'bargain' are 'agi'.
'mc' going around 'agi' is 'MAGIC'.
Can you help me to learn more?
(Other definitions for magic that I've seen before include "Enchantment" , "Unexpectedly produce" , "Illusory feat" , "Necromancy" , "Enchanting quality" .)